home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky sci.cognitive:744 sci.philosophy.tech:4229 sci.lang:8162
- Newsgroups: sci.cognitive,sci.philosophy.tech,sci.lang
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!hamblin.math.byu.edu!news.byu.edu!ux1!mica.inel.gov!guinness!garnet.idbsu.edu!holmes
- From: holmes@garnet.idbsu.edu (Randall Holmes)
- Subject: Re: Theories of meaning not relying solely on sym
- Message-ID: <1992Nov23.214849.27460@guinness.idbsu.edu>
- Sender: usenet@guinness.idbsu.edu (Usenet News mail)
- Nntp-Posting-Host: garnet
- Organization: Boise State University
- References: <1992Nov20.102242.23700@news.unige.ch> <1992Nov20.201258.17652@husc3.harvard.edu> <1992Nov23.150539.14871@news.unige.ch>
- Date: Mon, 23 Nov 1992 21:48:49 GMT
- Lines: 61
-
- In article <1992Nov23.150539.14871@news.unige.ch> swann@divsun.unige.ch (SWANN Philip) writes:
- >In article <1992Nov20.201258.17652@husc3.harvard.edu>, zeleny@husc10.harvard.edu (Michael Zeleny) writes:
- >
- >
- >>
- >> Great. Instead of promulgating my doctrinaire image, perhaps I can
- >> ask you to elucidate your [censored] comments. In what sense, and by
- >> what kind of argument has the Whitehead and Russell (note the correct
- >> order) claim that mathematics is reducible to logic been proved false?
- >> What is its relation to the formalist program, and what is the
- >> connection between the latter and Montague's proposal?
- >
- >As far as I know, the paradoxes in set theory and Goedel's work are generally
- >accepted as showing that mathematics cannot be derived from logic
-
- This is usually accepted, although it depends on exactly what you mean
- by "logic". If what is called "higher order logic" is logic, then
- logicism succeeds, because higher-order logic is equivalent to the
- theory of types, which is adequate for all practical mathematical
- purposes.
-
- and
- >set theory
-
- This is ridiculous. Mathematics is generally considered to be
- derivable from set theory (ZFC) and most of the derivation is in
- place. The derivation of math from set theory (not logic) has
- succeeded.
-
-
-
- - thus killing Hilbert's formalist programme.
-
- _Non sequitur_. Hilbert was not a logicist; he was a formalist. The
- collapse of Hilbert's program has nothing to do with success or
- failure of the logicist claim. The derivation of mathematics from set
- theory (which has succeeded) is also irrelevant to Hilbert's program;
- it has succeeded, not failed, but its methods are too strong to be
- relevant to Hilbert's program.
-
- It would appear
- >that *formal* logic and set theory are actually simply just bits of
- >mathematics with no special status. (I write this as a complete
- amateur).
-
- So I will forgive you.
-
- >Why do you think that what won't work for math will work for natural language
- >(which you believe to be just another formal language)?
-
-
- >
- >
- >Philip Swann
-
-
- --
- The opinions expressed | --Sincerely,
- above are not the "official" | M. Randall Holmes
- opinions of any person | Math. Dept., Boise State Univ.
- or institution. | holmes@opal.idbsu.edu
-